Honeywell true hepa allergen remover air purifier, captures up to 99.97% of microscopic allergens & certain airborne germs, circulates room air up to 5 times an hour, activated carbon pre filter helps reduce unpleasant odors, easy tap electronic controls with 3 air cleaning levels plus turbo clean setting, 2, 4, 8 hour timers with electronic filter replacement reminders. for room size 12′ x 13′ sqft, replacement filter is hrf-r1 & carbon pre-filter hrf-ap1, 5 year limited warranty.